**4. Conclusion**

A kinetic model for studying the anaerobic digestion process of banana stem waste was proposed on the basis of the two-stages process data obtained. The two-stages system comprising two bioreactors for acidogenic and methanogenic phases respectively. The experiments were conducted with hydraulic retention time (HRT) of 9 d corresponding to organic loading rate (OLR) of 4 gTS/l.d. The parameters obtained represent and predict the activity of the mixed culture in the biogas production of this waste. Kinetic evaluation of the experimental data provided μmax(maximum microorganism growth rate) and K(kinetic constant) values as 0.111 d-1 and 0.330 g/g respectively based on COD. The waste biodegradability (B0) was graphically evaluated to be 0.326 l methane/g COD.
